Seems like a brilliant political joke to me. No matter where you stand on the political spectrum, you can agree with him, laugh at the joke, and like him better.

If you like Obama, the joke is there's no difference.

If you don't like Obama, the joke is that Obama was a "community organizer" (read as: race-baiting rabble rouser) whereas Booker, as mayor, had to actually get real people in the community working together to effect real change. (In other words, it's a subtle way to point out that Booker has actual executive experience.)

Either way, you end up liking Cory Booker better. Quite clever. And the ambiguity gets it quoted and passed on.

(I tried to watch the video to get the context and the delivery, but this quote doesn't appear in the 3 minute clip I watched by following the link...)